Tears

 Tears are a clear liquid secreted by the lacrimal glands (tear gland) found in the eyes of all land mammals (except for goats and rabbits).[1][2] Their functions include lubricating the eyes (basal tears), removing irritants (reflex tears), and aiding the immune system.[3] Tears also occur as a part of the body's natural pain response.[4] Humans are the only mammals known to produce tears as part of an emotional response, such as out of joy or grief. Tears have symbolic significance among humans (see crying).[4] Emotional secretion of tears may serve a biological function by excreting stress-inducing hormones built up through times of emotional distress.[5][6] Tears are made up of water, electrolytes, proteins, lipids, and mucins that form layers on the surface of eyes.[7] The different types of tears—basal, reflex, and emotional—vary significantly in composition.[7] 

Comments

Post a Comment

Popular posts from this blog

Life

 Life is a characteristic that distinguishes physical entities that have biological processes, such as signaling and self - processes, from those that do not, either because such functions have ceased (they have died), or because they never had such functions and are classified as inanimate.
Read more

Acting

 Acting is an activity in which a story is told by means of its enactment by an actor or actress who adopts a character in television, film, radio, or any other medium that makes use of the mimetic mode. Acting involves a broad range of skills, including a well -facility, physical expressivity, vocal projection, clarity of speech, and the ability to interpret drama. Acting also demands an ability to employ dialects, accents, improvisation, observation and emulation, mime, and stage combat. Many actors train at length in specialist programmes or colleges to develop these skills. The vast majority of professional actors have undergone extensive training. Actors and actresses will often have many instructors and teachers for a full range of training involving singing, scene-work, audition techniques, and acting for camera. Most early sources in the West that examine the art of acting 
Read more